Sinkhole risk in Comanche County, TX: Pockets of it

Pockets of it

Soluble rock at the surface or under thin cover in part of the county.

On soluble rock: 28%
At or near the surface: 28%
Buried under cover: 0%

What this means before you buy

Check the parcel against your state survey sinkhole map, and ask for an inspection if cracks, depressions or sticking doors show up.

That works out to roughly 265 of Comanche County's 938 square miles on soluble rock, 265 of them with the rock at or near the surface. With about 14,359 residents (15 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 548 map points about 1.3 miles apart, so a pocket smaller than that can be missed or overstated.

Worth reading for this county: the signs to look for and how an inspection works, and how these percentages are measured.

Counties around Comanche County

The nearest county rated sinkhole country is Taylor County, TX, about 82 miles west. 6 of the 6 closest counties land in the same band, so this is a regional pattern rather than a local quirk.

Erath County, TX 28 mi northeast · 27% at surface
Brown County, TX 29 mi southwest · 19% at surface
Hamilton County, TX 31 mi southeast · 34% at surface
Eastland County, TX 31 mi northwest · 19% at surface
Mills County, TX 32 mi south · 16% at surface
Coleman County, TX 47 mi west · 36% at surface

Which formation it is

The largest mapped soluble unit here is the Glen Rose Limestone (limestone), Early Cretaceous in age, covering about 18% of the county. Next is the Paluxy Sand and Glen Rose Limestone, undivided at 6%.

Against the rest of Texas

Comanche County ranks 85 of 254 in Texas for soluble rock at the surface, and sits above 78% of US counties on that measure.